pherako...the speed density thing is solved really, really easily with an airbox...like EFI motorcycles and cars like the European M3's have.  An over-sized airbox keeps the pressures localized enough to get a decent signal. 

well, you need manifold pressure downstream of throttle body for speed density to work. I don't see how an airbox would smooth things out, except possibly during high throttle angle. on low throttle angle the valve closing pressure has the throttle plate to bounce against and pressure will still oscillate. so how exactly is an air box supposed to solve the problem?

all cars have an airbox... how are they different from EFI bikes and M3s? I'm gonna go look up some pictures.

makenzie71, I respect your opinion, but it's not adding up in my head, based on my limited knowledge. please explain more.

-Lev

well damn. no one actually posted a price point, so i guess folks would rather niggle EFI vs carbs than just enjoy riding. 

thanks for trying Mr. Threadstarter, you tried ! 

I posted a price: I said at 250 for a kit, I would.  Primarily for the novelty of having a EFI gs500.  250 is my top price for something that I don't see an appreciable difference in performance from, but like the aesthetics/ other appeal.

I work for a Megasquirt seller. The idea of putting EFI on my GS500 has crossed my mind a couple times - probably using it as a demonstrator for the upcoming Microsquirt. The thing is that most of the effort and money I'd like to put into my bike are for improving its comfort a little. On a stock engine, EFI might help get it some more mileage, and removing the choke would be nice to have. But I'm not looking to mod the bike for power yet - I seldom give it full throttle as it is, since I do a lot of my riding on crowded streets. EFI would really come into its own if I were trying to turbo it, but I'm not sure my riding skills are up to controlling something like that.

I don't see a kit selling for $250 unless it was based heavily on junkyard parts, using the ECU, throttle bodies, and a lot of other stuff from some other bike. For a turnkey package with all new parts, it seems like $1,000 would be a more likely price for a Microsquirt-based system, possibly more.

Quote from: MadScientistMatt on June 23, 2007, 02:34:13 PM
I work for a Megasquirt seller. The idea of putting EFI on my GS500 has crossed my mind a couple times - probably using it as a demonstrator for the upcoming Microsquirt. The thing is that most of the effort and money I'd like to put into my bike are for improving its comfort a little. On a stock engine, EFI might help get it some more mileage, and removing the choke would be nice to have. But I'm not looking to mod the bike for power yet - I seldom give it full throttle as it is, since I do a lot of my riding on crowded streets. EFI would really come into its own if I were trying to turbo it, but I'm not sure my riding skills are up to controlling something like that.

I don't see a kit selling for $250 unless it was based heavily on junkyard parts, using the ECU, throttle bodies, and a lot of other stuff from some other bike. For a turnkey package with all new parts, it seems like $1,000 would be a more likely price for a Microsquirt-based system, possibly more.

Would your estimate use Suzuki OEM parts, or short run stuff ?

Just wondering where the real cost would be involved. You know, something that you could find replacements for, 3-4 years down the line when foo-bar craps out.

Thanks for the input.

i was wondering if GSXR throttle bodies would fit - i've seen them go on ebay for 30 bucks... and they're already wired up for TPS and have the injectors. there's 4 so 2 kits could possibly come out of that...

Just a hasty back of the envelope thing using some sort of OEM parts - not necessarily Suzuki.  It might need a couple one-off brackets and such, but I'd envision doing this conversion using an off the shelf fuel pump and throttle bodies. The real price could be way off by hundreds.

Hello.
I am working at an EFI system for my GS. You can find more info here : www.suzukiGS500efi.blogspot.com